Pasteurizing valve



July 1:3 1926.

J. w. ENGHoLM PASTEURIZINQ VALVE Filed oct s, 192s .-2 Shots-Sheet 2 [NVE/vrai?. Jomv W. ENGHa/m.

Patented JulyA 13, 1926.v

UNITED srArss v-P?a;'rrzrfvif",o

Jenn W. ENGHOLMOE MINNuAroms, Mnvivssora.

rasrnuaiznvs VALVE. i

applicati@ filed` october rlhis invention relates tovalves especially adapted for holding units7 for Pasteuri'f:- ingvmilk or Yother liquids. Standard holding units are vmade up of a plurality of separate compartments, each compartment oiff which is provided with anintake and *outletl valve Vlocated at the top fand bottom' porf provide an exceedinglysimple but highly efficient valve'vvhich may be employed with slight change `for either the inlets kor outlet-s of the holding Vtanks having means for readily detecting leaks therein. 1:,

It is a further object to provide a Pas teurizer valve having leak-detecting means and having no VWorking-parts Within the valve chamber exceptth'e head andv smooth stem of a'single puppet valve. Y

.Another object of the invention is to provide such a valve capable of being readily attached and assembledfand soiconstructed that ready access 'may be `had to the entire valve chamber 'for cleaning. 7

A still further object is to provide such a Pasteurizer valve having a substantially cylindrical casing or chamber with a puppet valve seatedtherein and a relatively small leak-detecting valve closing a small leak outlet disposed on the outlet sideof the main valve, the valve stemsv of' said valves ivorking through' the sides ofthecasing whereby the opening and closing of' the valves are controlled Vby means entirely- Without the valve chamber. n

' Another object of the invention is to prou vide in such a device means for closing one of said valves and opening the other substantially simultaneously, the leakfletect'ing valve being preferablyv closed, however, slightly before the main valve is opened.

' These and other objects Will be apparent from the following description made in connection With the accompanying drawings wherein like characters refer to similarl karts throughout the severalvevvs and in which- Fig. l isa fragmentary endfelevatzion of f a single holding compartment er talt in a V8,1925. semina. 51,364.

outlet valve embodying the preferred form ofthe invention; f f f Y f v YFig". is an end elevation on an'enlarged scale of the outlet valveg" j Fig.` 3 is av vertical .sectionA of the outlet valve taken on the line 3--3 oi Fig. '2; .Fig. i is ai cross section taken o Hof l`ig.3;,andr,k Y F ig. -5 is a vertical section of vthe inlet valve taken'ontlie line 5-5 ci Fig. l.

' Yihile the inlet and outlet yvalves are substantially. similar in structure and may designedfto employ the same castings, the Vdissimilarbut correspondingA parts of the two valves as illustrated Will vbe numbered diii'erently. l

Referring to the outlet valve (see Figs. 2.

3* and 4),'a substantially cylindrical casing 6 is provided having the threaded intake passage 'vadapted to Vbe readily attached to f the outlet port XI Vof a standard holding tank X. 4The letter vY indicatesthey yWater heating jacket vdisposed about the tank X in the holder unit. Thecasing 6 is openat its 2 ngthe line f, 1,592,451 aries.

Pasteurizerequipped with an inlet and an yac n outer end and is also provided with an outlet y passage 8 throughone side, preferablyy the' bottom thereof,k connected to the out-let main C of the holding unit.- Y

The open 'end of casing 6 is closed by a plug 9 having threaded engagement therewith and provided with central sliding bearing 9ak and a threaded recess adapted to receivea packing Washer l0 and a packing plug'l'Oa. The plug 9 also carries av horizontally and outwardly projecting socket 1l, preferably cast integral therewith, terminating in an apertured and `threaded head ll and having a verticallyslottedportion1lb intermediateof said head and` plug 9. valve lseat 7a is provided about the intake passage 7 and ay puppet valve l2, preferably horizontally aligned with kpassage 7., is adapted to close the passage through'casing f6 having itsstem 12a slidably journaled in bearing 9a and projected beyond the outer end of plug 9 through ,thel socket 1l and'into the'apertured portion of the headk lla'. A. plug 13 is threaded into head ll1t .having its inner end recessed to accommodate the outer extremity of valve steinl2a and providing a seat fora-coiled spring 14E bearing against an annular flange' 15 formed in the interme-k date portion of valve stem 12a. The valve 12 is thus normally' held in closed rposition n valve stem 12a.

against seat 7u by means of the coiled spring 14, the tension of which `may be regulated by plug 13. A cap close-s the outer end of head l1.

A relatively small leak outlet 16 iis-provided in the bottom of casing 6 forming on its outer sid-e a seat for a small longitudinally projectable leak-detecting' valve 17 working through the end of the valve heus ing 1S and normally projected into closed position by means of a coiled spring 19. A port 1Sl1 in valve housing 18 permits the -escapement of leakage therefrom.

A vertically swinging reciprocating`- lever 20, having an outwardly and downwardly extending end, is pivote-d on an adjustable block 21 movable horizontally in the bracket 22 secured above casing 6 to the outer walls of the holder X. Block 21 is threaded to a bolt 22a and held in a rectangular seat'the-re by rendered longitudinally adjustable. The upper straight end of lever 2O enga-ges the cam B on the cam shaft t extending horizontally across one side of the holding unit and is obviously reciprocated by said cam. Shaft A is rotated intermittently by timing and driving mechanism not shown. The lower end of lever 2O termina-tes ina shipper fork working` through slotted portion 11b of socket 11, adapted to engage au annular groove 12b in the intermediate portion of An arcuate arm 20" is integral with and curves outwardly from the lower end of lever 2O working on the outer side of .slotted portion 111" of socket 11 and is pivotally connected with a link 23 connected at its inner end to the lupper arm of la bell crank lever 2d pivotally mounted on a boss 25 cast on the rear side of casing 6. The lower army of bell crank lever 2l is bent outwardly and downwardly and then at right angles with th-eplane ofthe upper portion of the lever, terminating` in a fork 24a' which engages an adjustable nut 2G carried by the lower end of valve 17. It will be noted that the fork 24 engages only the nut 25, thereby being operative only to open valve 17 while the coiled spring 19 is employed to close the same.

The reciprocation of .lever 20 and 'bell crank lever 2st connected thereto 'will obviously open the `main valve and close the lleak valve. substantiallyrat the same time and will, in turn, likewise permit* the main valve to beclosed and the leak valve to be opened.

The annular groove 12b on valve stem 12a receiving the shipper fork 20a is suflicient-ly wide to permit some play between the engagement of said two parts. In other words,

the'reciprocating lever 20, on'its stroke to open the main valve l2 will move a sho-rt distance before the valve is unseate'd. This small movement is suflici-ent to actuate bell crank lever 24 to such an extent that the leak-detecting valve 17 will be seated before valve 12 starts to open. Thus the leak-detecting means is closed before the tank X begins to drain.

The length of the stroke of the reciprocating lever 2O may be varied by adjusting the block 21, as desired7 in the bracket 22. Likewise the stroke of valve 17 may be regulated by changing the position of nut 26 on the outer end thereof.

rlhe intake valve, disposed at the top of each section of the holding unit, is very similar to the loutlet valve above described, with. theexception that the parts are re-arranged to eiici-ently control the milk'or liquid entering the holdingunit. A valve casing 30 is provided, resembling casing (i of the outlet valve but having its inlet passage 31 corresponding to the .outlet lpassage of the outlet valve connectedto the inlet main E of the holding unit. Inlet passage 31 communicates with, preferably, the top oft-casing 30. rllhe outlet passage of this valve is 'connected to a bent conduit 33 adapted to :deliver the milk or liquid into the top of one 4of the holding tanks X. In this inlet valve, the main valve seat 31a is provided about the cylindrical valve chamber within casing 80. The leak-detecting outlet 82 is disposed on the outlet side of valve seat 31a through the bottom of casing 30. The puppet valve employed to close the main passage, as well as the leak valve employed to Aclose the 1leakdet cting outlet, and the means for operating said valves simultaneously are identical with the corresponding structure employed in the outlet valve previously described, and are accordingly indicated by the same reference characters. The lreciprocating lever 2O of this valve `is actuated by the cam G on the cam shaft F, which extends vacross one side of the holding unit and is rotated intermittently by meanswof drivingmechanism, not shown.

Operation.

The

operation of the inlet and outlet valves Lis practically identical `and maybe briefly summarized as follows:-

rllhe controlling cam shaft or l", as the case may be, is rotated through a fraction of a revolution atintervals. each movement causing one of the valves for the several holding tanks to be operated, thereby vfilling or empty-ing the respective tanks X. one at a time. llVhen the cam "has engaged reciprocating llever 20, tlieaniain valve 12 in the valve casi-ng will be opened, while the leak-detecting valve ll' will be closed, the latter valve bei-ng actuated, ashas been described. slightly Abefore the main Vvalve is affected. As soon tank X has vcompletely drained or filled,v as the case may be, `thecontrolling cam shaft will be rotated slightly and` with the cooperation of spring lll, the main valve will be closed.v the leak-detecting lllll may be obvious.

valve 17 being simultaneously opened. f1tivill be noted that a relativelysmall counter-'I sunk portion is provided inthe bottom otv the valve casing above the leak outlctgadapted to collect any liquid leaking: throughL the main valve. f v Then tlieztankis being lilled,"ifftliere is a leak in the main outlet valve 12,'thesame will be indicated by a. small iioxv kof the liquid.

through tlieport 18a of casing 18. Similaily, when the ina-ininlet valve `l2 is closed, the tank having been lilled, a ,leak therein Since any liquid escaping from the main valve will be' delivered through tlielealz-detecting valve, there will Vbe no chance of raw milk being mixed With the Pasteurized milk having passed through the holding tank. f

. Merely by unscreiving the plug 9 in each of the valves, the entire'valve chamber will be made accessible .for cleaning or grindi ing the valve seat,l inmase that a bad leak cti ibi

` has been detected. Thus, at the'close of a daily run, the operatormay quickly rand simply clean the interior of the casingY 6, as

WellVV as the stem and head of the puppet valve. It Will be noted ltliat'tlie puppet valve l2 with its smooth head and steam is the only Working -part disposed. Within the casingt or 30. No springs, levers or other operating or closing means-can, therefore, touch the milk either before or after the same is Pasteurized, Whilev `the structure makes it possibleto regulate and operate all Working parts from Without Vthe valvrl casing.

From the above description, itivill be ap-`V parent that applicant has invented a. simple but highly elicient Pasteurizing valve highly successful for all of Vthe purposes iiitended. A p

It will, of course, be understood that various changes may be madey in the form, de-

tails, proportions and arrangement of part-s Y without departing from the scope of the invention. Y v

That is claimed is: Y

l. A device of the class described havingk in combination a. casing adapted to communicate With a liquid receptacle and having a passage therethrough, means for clos-1 ing said passage, said .casing comprising leak-detecting means for and in close proximity to said closing means through said cas-V ing and( operating means disposed without said casing tor rendering said leak-detecting means operative when said first inentioned means is' inoperative and for rendering said leak-detecting means inoperative when'said first mentioned means is operative. p 1 i 2. A device of the class described having in combination a casing adapted to communicate with a liquid receptacle and having a horizontally extending passage theref y *saidY main valve yand closing said leak-detliiough, a main valve seat about said passage, a horizontally vmovable mainvalve, a

leak vdetecting' valve seat through the bottom of said casing on the'outlet side of said `main `valve v,adjacent thereto, a substantially vertically movableleak detecting valve and means for operating said valve adapted to `open said main valve and closefsaid yleak detectingfvalve and vice versa.

ynetdevice of the class described coniprisingy a casing adapted to communicate with a liquid receptacle, havingapassage therethrough ,and a leak Vdetecting outlet communicating with said passage, long-ia tudinally movable means for opening and closing saidlpassage and longitudinally 'movable means it'or closing and opening said leak detecting outlet whereby said passage will be closed, when said leak detectingoutlet is open and vice versa-fand operating means Without said caring for substantially simultaneously controlling 'said passa-ge and outlet as set forth. f

Ll. A device ot the `class described having in combination a substantially stra-ight casing provided with inlet and 'outlet passages, a main valve' seat about one el" said passages,

a leak-detecting valve seat in thepb'ottoiny oit' vsaid casing adjacent saidmaiii valve seat communicating with the interior thereof on the outlet side ofsaid main seat,- a valve for each of said seats and operating mechanism disposed Without said casing vtor, opening tecting valve and vice versa. Y

5. The structure set forth in claimfl, and said valves having stems Working longitu-r K diiially through the sides of said casing and silient means Without said casing for closing each of said valves and means Without said casing co-operating with said resilient means outer side-of said cas- AKrk to open one of said valves and close the other e substantially as Tand for the purposes described. o n

7. The structure set forth in claim 6, said valves having stems Working through the sides of sai'd casing` and, a reciprocating lever Without said casing having connections ,y

with said stems to open and close said valves substantiallyfas described'.

8. The structure set forth in claiin and lmeans for varying the length Vof thestroke of said main valve. y

9. The structure set forth in claim 6 and ill ineans for varying the strole of said lealtdetecting valve.

10. The combination with a rotary cani shaft 'of a casing adapted to coinnninicare with a liquid receptacle and having a passage therethrough provided with tecting means, a v: lve adapted to open and close said passage and second valve adapt-- ed to operate said leali-detecting nie/ans, said valves having stems vvorling through the sides of said casing, a lever reciprocated by said cani shaft having connections with the outer ends o' said valve Steins vvhereh),v one of said valves will he opened and the other closed intermittently, substantialljvY as described.

ll. A. device of the class described ha c in eoinhination a snhstznitiallT cv n ri cal casino' adapted to communicate 'with lionid receptacle and pro vided with a paf' through one side thereof and a second sage in one end thereof, a valve seat intermediate said passages, a removable plug in said easing aligned with said valve seat, a longitudinally movable valve lapted to engage said valve seat and having` a stein slidably journalled through said plug, said caf*- ing also having a leali-detecting aperture through the bottom thereof disposed at the outlet side of said valve seat, a lonbitndina ly 'proj'eetahle valve adapted to close sain apertu're and reciprocating ineans Without said easing for opening said inain valve and closing said leak-detecting valve and vice versa substantially as described.

l2. ,A device of the class describes hav/*ng in combination a casing provided with a passage therethrough, a relativeljv7 small lealrdetecting outlet communicating 'with said passage, 'a valve `for opening and closing` said passage having a stem Working through a side of said casing, ay second valve for opening and closing said leak-detecting outlet having its stein also working through a side ot' said casing and 'means without said casing for 'jointly operating' vsaid valves wherebyv said lealedetecting valve 'will he closed slightly before said main valve is opened and said leak-detecting valve will he opened approximately when said main valve is Closed.

13. A device of the class c escr'ihed having in Combination a casing adapted to communicate with a liquid receptacle having a passage therethrough, and a leak-detecting ontlet eonnnunicating with said passage, valves "for closing said passage and said oul'l-V 1 ing. steins Working thi-oi easing, a reciprocating casing having an arm connected with said passage closing valve and a.' hell crank lever connected with said reciprocating lever and With said leak-detecting valve Wherehj,- when 'one ot said valves is opened, the other will he closed.

14. A device olz the class described having in combination a easing adapted to eonnnunicate with a liquid receptacle and 'having al passage therethrough, a niain valve seat about said passage, a leal"` detecting valve seat through the bottoni of said easing, adjacent said inain valve seat, longitudinally inovahle valves'for each of said valveseats, means Without said casing 'for operating said inain valve and ineans also without said casing for operating said leali detecting valve.

l5. The structure set forth in claim ll andsaid casing havinga concave portion on the inner side about said vleak detecting valve seat.

In testimony Whereoll I allix 'my signature.

JGHN XV. ENGHGLM. 

